This is how i got these,I know there is a post on this before,I posted it,but these are such a good offer i thought post on it's own,as these are selling from £39.99 at other stores.
The K9 on it's own from Tesco is £19.95 + £4.95 delivery or using the sim method,you can get this for £19.95.
But using this method you can get this for about the same or less with extra items added for no extra cost.
I have done a screen shot for an example.
Add the k9 to basket
Add value sim ( £5.00 1,as the other is out of stock)do not add if getting delivered to local store for free.
Then add anything from the sale that goes into basket at full price,to make your basket to total £40 or over just over.
Use the £5.00 discount code from forums.
You can sign up for more then 1 account as it seems to go by your email address,as I signed up my hubbies no problem and used code.
It does take a bit of time finding the right amount for discount etc,but worth it.
This will work or other items too,as the DR WHO CYBERMAN VOICE CHANGER is £14.45 too if you want to try it with this.
My screen shot will make it clearer,i hope,also links to the other thread about how this works will help too.
Don't forget Quidco too.
Also if you get your total nearer £50,you can use the code for 500 extra points instead of £5.00 discount.